In case you missed the memo, tonight is Will (Matthew Morrison) and Emma's (Jayma Mays) big wedding—you know, the one the diehard "Wemma" fans have been waiting years to see (no big whoop). And from what Kevin McHale tells us, there will be at least one moment that will leave your jaw on the floor.

"I literally yelled at the script!" he admits of tonight's wedding shenanigans. "I finished it and was like, ‘Noooo! It's crazy.'"

We already know Emma (Mays) will be looking none too happy on the big day, thanks to the emotional sneak-peek photo we scored of Ms. Pillsbury in her bridal gown—looking gorgeous, but all choked up.

And McHale, who we caught up with at last night's Topshop Topman store opening, hints that fans should expect the unexpected. "There is drama, like a whole different level of drama. It's juicy drama. It's juicy, scandalous, gossipy drama."

Jayma Mays' status of "special guest star" has us doubly concerned Will and Emma won't get their long-awaited happy ending. (Unless we're talking about the very beginning of the TV show Happy Endings, where someone is left at the altar, and in that case…Sigh. Wemma fans, we will join you in a group shudder.)